/* sha224.h
**
** Copyright (c) 2007, Meadhbh S. Hamrick
** All rights reserved.
** 
** Redistribution  and  use  in  source  and  binary  forms,  with  or  without
** modification, are permitted provided that the following conditions are met:
** 
**  * Redistributions of  source code must  retain the above  copyright notice,
**    this list of conditions and the following disclaimer.
** 
**  * Redistributions in binary form must reproduce the above copyright notice,
**    this list of conditions and the following disclaimer in the documentation
**    and/or other materials provided with the distribution.
** 
**  * Neither the  name of  Project Meadhbh  nor the names of  its contributors
**    may be used  to endorse  or promote  products derived from this  software
**    without specific prior written permission.
** 
** THIS SOFTWARE IS PROVIDED BY  THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
** AND ANY  EXPRESS OR IMPLIED WARRANTIES,  INCLUDING, BUT NOT  LIMITED TO, THE
** IMPLIED WARRANTIES  OF MERCHANTABILITY AND FITNESS FOR  A PARTICULAR PURPOSE
** ARE DISCLAIMED.  IN NO  EVENT SHALL THE  COPYRIGHT OWNER OR  CONTRIBUTORS BE
** LIABLE  FOR  ANY  DIRECT,   INDIRECT,  INCIDENTAL,  SPECIAL,  EXEMPLARY,  OR
** CONSEQUENTIAL  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED  TO,  PROCUREMENT  OF
** SUBSTITUTE GOODS  OR SERVICES;  LOSS OF USE,  DATA, OR PROFITS;  OR BUSINESS
** INTERRUPTION)  HOWEVER CAUSED  AND ON  ANY THEORY  OF LIABILITY,  WHETHER IN
** CONTRACT,  STRICT LIABILITY,  OR  TORT (INCLUDING  NEGLIGENCE OR  OTHERWISE)
** ARISING IN ANY WAY  OUT OF THE USE OF THIS SOFTWARE,  EVEN IF ADVISED OF THE
** POSSIBILITY OF SUCH DAMAGE.
** 
** $Id: sha224.h 46 2007-08-30 16:52:27Z msh.mobile $
*/

/* Macro Definitions */
#ifndef _H_SHA224
#define _H_SHA224

/* File Inclusions */

/* Typedefs, Structs, Enums, Unions */

/* todo: provide an option for SHA224 to be calculated using the
** "space efficient" technique defined in FIPS 180-2, section 6.1.3.
*/

typedef struct {
  uint64_t count; /* number of bytes processed */
  union {                   /* data buffer */
    uint8_t asChar[ 256 ];
    uint32_t asInt[ 64 ];
    uint64_t asLongLong[ 32 ];
  } data;
  uint32_t state[ 8 ];  /* internal state */
} tMCSha224;

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

  /* Function Prototypes */

  void mc_mic_sha224_clone( tMCSha224 *new_context, tMCSha224 *old_context );
  void mc_mic_sha224_clear( tMCSha224 *context );
  void mc_mic_sha224_initialize( tMCSha224 *context );
  void mc_mic_sha224_update( tMCSha224 *context, uint8_t *data, uint32_t length );
  void mc_mic_sha224_digest( tMCSha224 *context, uint8_t *digest );

  /* Global Variable Declarations */

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* _H_MCRYPTO */
